title: Genetic characterization of two putative toxin-antitoxin systems on cryptic plasmids from Bacillus thuringiensis strain YBT-1520.
abstract: A novel putative toxin-antitoxin segregational stability system named KyAB system was identified in a novel native plasmid pBMB8240 from Bacillus thuringiensis strain YBT-1520, based on sequences homology with other toxin-antitoxin systems, the lethal activity of the KyB putative toxin in Escherichia coli and the stabilizing effect of the kyAB system in Bacillus thuringiensis. Secondarily, the native plasmid pBMB9741 from the same strain was resequenced and the corrected plasmid was named as pBMB7635. Based on sequence homology with the tasAB system and the lethal activity of toxin protein in Escherichia coli, a tasAB-like putative toxin-antitoxin system was identified on pBMB7635.
authors.affiliation: State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University,430070 Wuhan, P R China.
authors.forename: Xiaojin
authors.initials: X
authors.lastname: Liu
authors.forename: Shufang
authors.initials: S
authors.lastname: Zhu
authors.forename: Weixing
authors.initials: W
authors.lastname: Ye
authors.forename: Lifang
authors.initials: L
authors.lastname: Ruan
authors.forename: Ziniu
authors.initials: Z
authors.lastname: Yu
authors.forename: Changming
authors.initials: C
authors.lastname: Zhao
authors.forename: Ming
authors.initials: M
authors.lastname: Sun
mesh_terms: D000992:Antitoxins / Q000235:genetics* / Q000378:metabolism; D001413:Bacillus thuringiensis / Q000235:genetics* / Q000378:metabolism; D001426:Bacterial Proteins / Q000235:genetics* / Q000378:metabolism; D001427:Bacterial Toxins / Q000235:genetics* / Q000378:metabolism; D004926:Escherichia coli / Q000235:genetics / Q000378:metabolism; D010957:Plasmids / Q000235:genetics*
chemical_list: D000992:Antitoxins; D001426:Bacterial Proteins; D001427:Bacterial Toxins